<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Netty WebSocket</title>
    Netty WebSocket 时间服务器
</head>
<body>

    <form onsubmit="return false;">
        <input type="text" name="message" value="Netty 最佳实践"/>
        <br/>
        <input type="button" value="发送WebSocket请求消息" onclick="send(this.form.message.value)"/>
        <hr color="blue"/>
        <h3>服务器返回的应答消息</h3>
        <textarea id="responseText" style="width: 500px; height:300px;"></textarea>
    </form>
</body>
<script type="text/javascript">
    var socket;
    if (!window.WebSocket) {
        window.WebSocket = window.MozWebSocket;
    }
    if (window.WebSocket) {
        socket = new WebSocket("ws://localhost:8090/websocket");
        socket.onmessage = function(event) {
            var ta = document.getElementById("responseText");
            ta.value = "";
            ta.value= event.data;
        };
        socket.onopen = function(event) {
            var ta = document.getElementById("responseText");
            ta.value = "打开WebSocket访问正常，浏览器支持WebSocket";
        }
        socket.onclose = function(event) {
            var ta = document.getElementById("responseText");
            ta.value = "WebSocket关闭";
        }
    } else {
        alert("浏览器不支持WebSocket协议");
    }

    function send(message) {
        if(!window.WebSocket) {
            return;
        }

        if (socket.readyState === WebSocket.OPEN) {
            socket.send(message);
        } else {
            alert("WebSocket连接没有建立成功")
        }
    }
</script>
</html>